The essential layout attributes of a visual table can be defined by the location of four critical grid cells. Although these
critical cells can often be located by automated analysis, some means of human interaction is necessary for correcting
residual errors. VeriClick is a macro-enabled spreadsheet interface that provides ground-truthing, confirmation,
correction, and verification functions for CSV tables. All user actions are logged. Experimental results of seven subjects
on one hundred tables suggest that VeriClick can provide a ten- to twenty-fold speedup over performing the same
functions with standard spreadsheet editing commands.